Biology Chapter on Mitosis and Meiosis
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Questions and Answers

Which statement is true regarding the outcome of mitosis?

  • Creates four unique daughter cells
  • Involves two rounds of cell division
  • Produces gametes with half the chromosome number
  • Results in two identical daughter cells (correct)

What is a characteristic of meiosis?

  • Results in two daughter cells with genetic diversity
  • Results in four unique daughter cells (correct)
  • Creates daughter cells for growth and repair
  • Goes through one cell division to produce gametes

Which statement does NOT apply to both mitosis and meiosis?

  • Involves crossing over of genetic material (correct)
  • Results in the division of genetic material
  • Undergoes phases of cell division
  • Involves the creation of new cells

Which of the following is a function of mitosis?

<p>Creation of somatic cells for growth (B)</p> Signup and view all the answers

How does the chromosome number of daughter cells compare to the parent cell in meiosis?

<p>Daughter cells have half the chromosome number as parent cell (D)</p> Signup and view all the answers

What is the primary purpose of mitosis?

<p>Repair and growth (C)</p> Signup and view all the answers

How many daughter cells are produced through meiosis?

<p>Four unique daughter cells (C)</p> Signup and view all the answers

Which statement accurately describes the chromosome count in the daughter cells produced by meiosis?

<p>Daughter cells have half the number of chromosomes as the parent cell. (B)</p> Signup and view all the answers

What distinguishes the number of divisions in mitosis from that in meiosis?

<p>Mitosis involves one division, while meiosis involves two divisions. (C)</p> Signup and view all the answers

What is the chromosome composition in the parent cell for both mitosis and meiosis?

<p>46 chromosomes (A)</p> Signup and view all the answers

What is the difference between homozygous and heterozygous genotypes?

<p>Homozygous has two identical alleles while heterozygous has two different alleles. (A)</p> Signup and view all the answers

Which process results in the formation of four new sex cells?

<p>Meiosis (A)</p> Signup and view all the answers

Which of the following statements about alleles and phenotypes is accurate?

<p>The presence of at least one dominant allele will result in the dominant phenotype. (D)</p> Signup and view all the answers

What defines a mutation in genetics?

<p>An alteration in the nucleotide sequence of a gene. (B)</p> Signup and view all the answers

In what way does mitosis differ from meiosis?

<p>Mitosis divides once producing two identical daughter cells; meiosis divides twice producing four non-identical cells. (C)</p> Signup and view all the answers

What is the main difference in the outcome of mitosis compared to meiosis?

<p>Mitosis produces daughter cells with the same chromosome number, while meiosis produces daughter cells with half. (C)</p> Signup and view all the answers

During which phase of mitosis do the duplicated chromosomes align in the center of the cell?

<p>Metaphase (D)</p> Signup and view all the answers

What occurs during Anaphase I of meiosis?

<p>Homologous chromosomes separate and move to opposite poles. (C)</p> Signup and view all the answers

Which phase of meiosis results in the formation of polar bodies in females?

<p>Telophase II (B)</p> Signup and view all the answers

How does the chromosome number in daughter cells after meiosis compare to the original cell?

<p>It is halved compared to the original cell. (C)</p> Signup and view all the answers

Flashcards

Mitosis

A type of cell division that produces two identical daughter cells, each with the same number of chromosomes as the parent cell.

Meiosis

A type of cell division that produces four daughter cells, each with half the number of chromosomes as the parent cell. These cells are unique and are used for sexual reproduction.

Somatic Cells

All body cells except reproductive cells, such as skin, muscle, and bone cells.

Gametes

Reproductive cells, such as sperm and egg cells.

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Genetic Diversity

The variation of genes within a population, which increases the chances of survival and adaptation.

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Number of Divisions in Mitosis

Mitosis involves a single division of the parent cell, resulting in two daughter cells.

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Number of Divisions in Meiosis

Meiosis involves two divisions of the parent cell, resulting in four daughter cells.

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Chromosomes in Daughter Cells of Mitosis

Daughter cells produced by mitosis have the same number of chromosomes as the parent cell, which is 46 in humans.

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Prophase I

The first stage of meiosis, where homologous chromosomes pair up and exchange genetic material (crossing over).

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Anaphase I

The stage in meiosis where homologous chromosome pairs separate and move to opposite poles of the cell.

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Telophase I

The final stage of meiosis I, where two daughter cells are formed, each with half the number of chromosomes as the original cell.

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Recessive Allele

An allele that is masked (covered up) when a dominant allele is present. An organism must have 2 recessive alleles to show the recessive trait.

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Punnett Square

A chart that shows all the possible combinations of alleles from a genetic cross.

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Phenotype vs. Genotype

Phenotype is the outward appearance (what you see), while genotype is the genetic makeup (the alleles).

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Homozygous vs. Heterozygous

Homozygous: having two identical alleles for a trait (e.g., AA or aa). Heterozygous: having two different alleles for a trait (e.g., Aa).

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Mutation's Effect

A change in a gene or chromosome, potentially altering the organism's traits.

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